N-UNCOUNT
无法描述;难以形容
You can say that something is beyond description, or that it defies description, to emphasize that it is very unusual, impressive, terrible, or extreme.
例句
His face is weary beyond description...
他一脸难以形容的疲惫。
We were in a disaster situation that defies description.
我们陷入了难以言表的糟糕处境。